Slack reviews

4.0

77% would recommend to a friend

(1,094 total reviews)
avatar

Stewart Butterfield

88% approve of CEO

70% positive business outlook

Slack has an employee rating of 4.0 out of 5 stars, based on 1,094 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Slack employee rating is in line with the average (within 1 standard deviation) for employers within the Tecnologías de la información industry (3.9 stars).

Reviews by job title

1K reviews
1.0
Oct 21, 2025
Recommend
CEO approval
Business Outlook

Pros

They give a lot of swag, work pace isn’t too hard, mid level people are generally nice

Cons

This company ruined my life and PIP’d me for taking time off to mourn. They took from me my passion for what I do and made me realize how quickly someone will throw you under a bus. Scheming managers. They did a soft layoff where they were forced to PIP a certain number of employees, I had never had a performance conversation or a negative comment and the manager fabricated evidence for a pip (including asking for advice, taking sick time when my dad died, and calling in a senior engineer during a high severity outage). I’ve personally spoken to multiple other engineers that had the exact same thing happen to them.

4.0
Oct 5, 2025

Good place to work

Recommend
CEO approval
Business Outlook

Pros

* Fairly relaxed culture, by tech standards * Interesting problems, "big" data * Coworkers are nice and friendly people

Cons

* Some people are clearly coasting * Salesforce as a whole is not doing well (<10% Y/Y growth) * Random layoffs and poor communication from company leadership * In-office requirements of 3 days/week doesn't make sense for many (most of the people I work with don't even live in New York)

Viewing 22 - 24 of 1,094 Reviews

Glassdoor has 1,226 Slack reviews submitted anonymously by Slack employees. Read employee reviews and ratings on Glassdoor to decide if Slack is right for you.